Sleeping bag with openable vent



FIG. 1 is a front perspective view of a sleeping bag with an openable vent shown broken away to indicate no specific length;

FIG. 2 is an enlarged fragmentary front elevation view of the openable vent shown broken away to indicate no specific length, with the zippers shown in an alternate position of use; and,

FIG. 3 is a reduced scale front elevation view of the sleeping bag with openable vent shown broken away to indicate no specific length. 

The ornamental design for sleeping bag with openable vent, as shown and described. 